Vehicle Lamp Heat Sink with Spatially Separated LED and Driver
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Solution Overview
Problem
Existing vehicle lamps with LEDs face limitations in power and luminous flux due to poor heat dissipation, as the driver and LED are often closely arranged on a single printed circuit board, concentrating heat and hindering efficient heat dissipation.
Innovation Solution
A lamp design featuring a light source and driver on separate circuit boards, both integrated within a heat sink, with the driver spatially separated from the light source and connector, allowing for improved heat dissipation and a compact structure that enhances power and luminous flux by separating heat generation sources and incorporating a heat sink with specific structural features for efficient conduction and air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driver and light source are arranged on the same printed circuit board, then the device complexity is reduced, but the heat dissipation performance deteriorates
Solution Approach 1:
The patent divides the lamp into separate functional modules: the light source module (LEDs on a first circuit board) and the driver module (electronic components on a second circuit board). This segmentation allows each module to be independently optimized for its function, with the light source positioned for optimal light emission and the driver positioned for effective heat dissipation through the heat sink.
Solution Approach 2:
The driver electronic components are extracted from the light source circuit board and placed on a separate driver circuit board. This extraction removes the heat-generating driver components from proximity to the light source, allowing the heat sink to focus on dissipating heat from both sources independently, thereby improving overall heat dissipation performance.
2Temperature
If the driver is spatially separated from the light source, then the heat dissipation performance is improved, but the device complexity increases
Solution Approach 1:
The patent merges the light source module and driver module within a unified lamp housing structure that includes an integrated heat sink. Both modules share the same thermal management system and housing, which consolidates the overall structure and reduces complexity despite the spatial separation of components. The heat sink serves both modules simultaneously.
Solution Approach 2:
The heat sink is designed as a universal thermal management component that serves both the light source and the driver electronic components. This multi-functional design allows a single structure to perform heat dissipation for multiple components, reducing the need for separate cooling solutions and thereby reducing overall device complexity.
3Volume of moving object
If multiple components are integrated inside the heat sink, then the installation space is reduced, but the heat dissipation performance may deteriorate
Solution Approach 1:
The patent implements a nested arrangement where the driver circuit board and light source circuit board are positioned at different levels within the heat sink structure. The driver board is mounted on the upper surface of the heat sink, while the light source board is positioned in a lower cavity or recessed area. This nesting allows multiple components to occupy the same vertical space without interfering with each other's heat dissipation paths.
Solution Approach 2:
The patent utilizes the vertical dimension (z-axis) to arrange components at different heights within the heat sink. The driver components are positioned on the upper surface while the light source components are positioned in a lower plane, creating a multi-level configuration. This dimensional arrangement allows compact integration while maintaining adequate thermal pathways for both components to the heat sink.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively increases power and luminous flux by optimizing heat management, allowing for better heat dissipation and a compact installation space, making it suitable for vehicles with limited space, such as headlamps or taillights.
Implementation Method 1
heat generated from the light source and heat generated from the driver are separated from each other rather than concentrated, thereby facilitating heat dissipation
Implementation Method 2
a heat sink for dissipating heat generated from the LED and/or the driver
Implementation Method 3
A lamp is known, including a light-emitting diode (LED) serving as a light source
Data Source
AI summary
In an embodiment a lamp includes a light source having a light source circuit board and a light emitting element arranged on the light source circuit board, a driver configured to drive the light source and having a driving circuit board and a driving electronic element arranged on the driving circuit board, a connector connectable to a power source, wherein the driver is connected to the connector such as to be spatially separated from the light source and a heat sink inside which the light source and the connector are fixedly attached in such a manner that the light source and the driver are radially surrounded by the heat sink, wherein the connector includes a supporting column configured to support the driving circuit board and a retainer configured to hold the driving circuit board.